Stamatis Zampetakis created HADOOP-19769:
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Summary: New maven plugin for checking XML files for deprecated
properties
Key: HADOOP-19769
URL: https://issues.apache.org/jira/browse/HADOOP-19769
Project: Hadoop Common
Issue Type: Task
Reporter: Stamatis Zampetakis
Assignee: Stamatis Zampetakis
Some of the configuration files that exist in the project contain deprecated
properties. Files such as
[core-default.xml|https://github.com/apache/hadoop/blob/ee73a9b7db7db9d213354c5ffc33c3d8027c10c6/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml]
act as templates for end-users and serve as basis in every new deployment.
Leaving deprecated properties in the templates leads to the proliferation of
deprecations increasing technical debt.
I propose to implement a new maven plugin that collects all deprecated
properties present in the project (using bytecode analysis) and then checks
that the XML configuration files (at least *default.xml) do not contain such
entries.
Given that the deprecation definitions are spread across modules and they
require the class to be loaded its difficult/impossible to perform the checks
using regular unit testing thus a custom maven plugin seems to be the cleanest
option.
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